Marine picoplankton size distribution and optical property contrasts throughout the Atlantic Ocean revealed using flow cytometry

Smyth, TJ, Tarran, GA and Sathyendranath, S 2019 Marine picoplankton size distribution and optical property contrasts throughout the Atlantic Ocean revealed using flow cytometry. Applied Optics, 58 (32). 8802. https://doi.org/10.1364/AO.58.008802

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Abstract/Summary

Depth-resolved flow cytometric observations have been used to determine the size distribution and refractive index (RI) of picoplankton throughout the Atlantic Ocean. Prochlorococcus frequently showed double size distribution peaks centered on 0.75±0.25 and 1.75±0.25µm; the smallest peak diameters were ≤0.65µm in the equatorial upwelling with larger cells (∼0.95µm) in the surface layers of the tropical gyres. Synechococcus was strongly monodispersed: the smallest (∼1.5µm) and largest cells (∼2.25−2.50µm) were encountered in the lowest and highest abundance regions, respectively. Typical RI for Prochlorococcus was found to be ∼1.06, whereas for Synechococcus surface RI varied between 1.04–1.08 at high and low abundances, respectively.

Item Type:	Publication - Article
Subjects:	Biology Ecology and Environment Marine Sciences
Divisions:	Plymouth Marine Laboratory > National Capability categories > Atlantic Meridional Transect Plymouth Marine Laboratory > National Capability categories > Single Centre NC - CLASS
Depositing User:	Tim Smyth
Date made live:	17 Jan 2020 14:34
Last Modified:	25 Apr 2020 10:00
URI:	https://plymsea.ac.uk/id/eprint/8272

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